AP_NavEKF2: minor comment fixes

libraries/AP_NavEKF2/AP_NavEKF2.h

@@ -432,10 +432,10 @@ private:
     AP_Int8 _flowUse;               // Controls if the optical flow data is fused into the main navigation estimator and/or the terrain estimator.
     AP_Int16 _mag_ef_limit;         // limit on difference between WMM tables and learned earth field.
     AP_Float _hrt_filt_freq;        // frequency of output observer height rate complementary filter in Hz
-    AP_Int8 _gsfRunMask;            // mask controlling which EKF3 instances run a separate EKF-GSF yaw estimator
+    AP_Int8 _gsfRunMask;            // mask controlling which EKF2 instances run a separate EKF-GSF yaw estimator
-    AP_Int8 _gsfUseMask;            // mask controlling which EKF3 instances will use EKF-GSF yaw estimator data to assit with yaw resets
+    AP_Int8 _gsfUseMask;            // mask controlling which EKF2 instances will use EKF-GSF yaw estimator data to assit with yaw resets
     AP_Int16 _gsfResetDelay;        // number of mSec from loss of navigation to requesting a reset using EKF-GSF yaw estimator data
-    AP_Int8 _gsfResetMaxCount;      // maximum number of times the EKF3 is allowed to reset it's yaw to the EKF-GSF estimate
+    AP_Int8 _gsfResetMaxCount;      // maximum number of times the EKF2 is allowed to reset it's yaw to the EKF-GSF estimate
 
 // Possible values for _flowUse
 #define FLOW_USE_NONE    0

libraries/AP_NavEKF2/AP_NavEKF2_MagFusion.cpp

@@ -1216,7 +1216,7 @@ void NavEKF2_core::recordMagReset()
 // Reset states using yaw from EKF-GSF and velocity and position from GPS
 bool NavEKF2_core::EKFGSF_resetMainFilterYaw()
 {
-    // Don't do a reset unless permitted by the EK3_GSF_USE and EKF3_GSF_RUN parameter masks
+    // Don't do a reset unless permitted by the EK2_GSF_USE_MASK and EKF@_GSF_RUN_MASK parameter masks
     if ((yawEstimator == nullptr)
         || !(frontend->_gsfUseMask & (1U<<core_index))
         || EKFGSF_yaw_reset_count >= frontend->_gsfResetMaxCount) {